“I had been feeling a little emotional and crazy and thought, ‘Wow, this isn’t me,’ ” she says in the latest issue of PEOPLE. “Then all of a sudden I realized, ‘Hey, I remember this.’ When I saw the results of the test, my jaw dropped. Chip was in the driveway about to leave when I called him back and said, ‘We’re pregnant!’ He was so excited. We’re both just so excited.”

“Every single time they see my belly they have to rub it,” she says. “I think it’s sweet because they’re older now, and I can see them wanting to be a part of this. We’re all rallying around this baby, which I feel is a sweet gift to our family.”